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7 April, 13:05

True or false? the diaphragm is a secondary muscle of respiration.

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  1. 7 April, 13:22
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    The diaphragm is the major muscle responsible for breathing. It is a thin, dome-shaped muscle that separates the abdominal cavity from the thoracic cavity. During inhalation, the diaphragm contracts, so that its centre moves caudally (downward) and its edges move rostrally (upward).
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